Grommet

ABSTRACT

The grommet includes an opposing portion  32  that opposes a portion surrounding a mounting hole  12  in a vehicle body panel  11 , and a second water-blocking portion  34  that extends from the opposing portion  32  and comes in contact with the vehicle body panel  11 . The second water-blocking portion  34  is formed in an annular shape that is to surround the mounting hole  12 . The second water-blocking portion  34  is provided with a base portion  40  that extends from the opposing portion  32  toward the vehicle body panel  11 , a first lip portion  41  that extends from the leading end of the base portion  40  and comes in contact with the vehicle body panel  11 , and a second lip portion  42  that extends from the leading end of the base portion  40  and comes in contact with the vehicle body panel  11.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on and claims priority from Japanese PatentApplication No. 2020-180661, filed on Oct. 28, 2020, with the JapanPatent Office, the disclosure of which is incorporated herein in theirentireties by reference.

TECHNICAL FIELD

The present disclosure relates to a grommet.

BACKGROUND

A grommet disclosed in Japanese Patent Laid-open Publication No.2014-033564 is configured to be mounted into a mounting hole formed in avehicle body panel and block water from entering between the mountinghole and a wire harness that is inserted into the mounting hole, forexample. Specifically, the grommet includes an annular seal portion thatcomes in close contact with the portion surrounding the mounting hole inthe vehicle body panel, and the seal portion suppresses water or thelike from entering the mounting hole.

SUMMARY

The inventor of the present invention examined configurations of a sealportion that can improve the water blocking property in a grommet suchas described above.

In view of this, an object of the present invention is to provide agrommet that can improve the water blocking property.

A grommet according to the present disclosure is a grommet that is to bemounted into a mounting hole of a vehicle body panel through which awire harness is to be passed, the grommet including an opposing portionthat is to oppose a portion surrounding the mounting hole in the vehiclebody panel and a water-blocking portion that extends from the opposingportion and is to come in contact with the vehicle body panel, and thewater-blocking portion is formed in an annular shape that is to surroundthe mounting hole, the water-blocking portion includes a base portionthat extends from the opposing portion toward the vehicle body panel, afirst lip portion that extends from the leading end of the base portionand is to come in contact with the vehicle body panel, and a second lipportion that extends from the leading end of the base portion and is tocome in contact with the vehicle body panel, the first lip portion is toextend toward the vehicle body panel while inclining toward an outercircumference, and the second lip portion is to extend toward thevehicle body panel while inclining toward an inner circumference.

According to the present disclosure, it is possible to provide a grommetthat can improve the water blocking property.

The foregoing summary is illustrative only and is not intended to be inany way limiting. In addition to the illustrative aspects, embodiments,and features described above, further aspects, embodiments, and featureswill become apparent by reference to the drawings and the followingdetailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of a grommet of an embodiment.

FIG. 2 is a cross-sectional view of the grommet of the embodiment.

FIG. 3 is an enlarged cross-sectional view showing a main part of thegrommet of the embodiment.

FIG. 4 is an enlarged cross-sectional view showing a main part of thegrommet in a state of being mounted to a vehicle body panel.

DETAILED DESCRIPTION

In the following detailed description, reference is made to theaccompanying drawings, which form a part hereof. The illustrativeembodiments described in the detailed description, drawings, and claimsare not meant to be limiting. Other embodiments may be utilized, andother changes may be made, without departing from the spirit or scope ofthe subject matter presented here.

Description of the Embodiments of the Disclosure

First, embodiments of the present disclosure will be listed andillustrated.

A grommet of the present disclosure is [1] A grommet that is to bemounted into a mounting hole of a vehicle body panel through which awire harness is to be passed, the grommet including an opposing portionthat is to oppose a portion surrounding the mounting hole in the vehiclebody panel and a water-blocking portion that extends from the opposingportion and is to come in contact with the vehicle body panel, and thewater-blocking portion is formed in an annular shape that is to surroundthe mounting hole, the water-blocking portion includes a base portionthat extends from the opposing portion toward the vehicle body panel, afirst lip portion that extends from the leading end of the base portionand is to come in contact with the vehicle body panel, and a second lipportion that extends from the leading end of the base portion and is tocome in contact with the vehicle body panel, the first lip portion is toextend toward the vehicle body panel while inclining toward an outercircumference, and the second lip portion is to extend toward thevehicle body panel while inclining toward an inner circumference.

With this configuration, the water-blocking portion has a configurationin which the lip portion at the leading end of the base portion isbranched into two. For this reason, it is possible to favorably gainsufficient contact area between the water-blocking portion and thevehicle body panel. As a result, the water blocking property of thewater-blocking portion can be improved. Furthermore, when the first lipportion and the second lip portion are brought into close contact withthe vehicle body panel, it is possible to make the water-blockingportion suction to the vehicle body panel due to a space surrounded bythe first lip portion, the second lip portion, and the vehicle bodypanel being converted to negative pressure. When the water-blockingportion suctions to the vehicle body panel, a gap is unlikely to occurbetween the vehicle body panel and the water-blocking portion, and as aresult, the water blocking property of the water-blocking portion can beimproved.

Furthermore, with the above-described configuration, it is possible toreduce the insertion force at the time of inserting the grommet into themounting hole due to deformation of the base portion, while bringing thefirst lip portion and the second lip portion into close contact with thevehicle body panel.

[2] A configuration is also possible in which the base portion extendstoward the vehicle body panel while inclining toward the outercircumference or the inner circumference.

With this configuration, when the water-blocking portion is pressedagainst the vehicle body panel, the base portion of the water-blockingportion can be favorably bent toward the outer or inner circumference.In this manner, the insertion force at the time of inserting the grommetinto the mounting hole can be reduced more favorably. As a result, it ispossible to further contribute to improvement in the mountability of thegrommet.

[3] A configuration is also possible in which the base portion extendstoward the vehicle body panel while inclining toward the outercircumference, and the base portion and the first lip portion extend inthe same direction.

With this configuration, it is possible to favorably bring the first lipportion into close contact with the vehicle body panel.

[4] A configuration is also possible in which the second lip portionincludes a first extended portion that extends from the base portion anda second extended portion that extends from the leading end of the firstextended portion, and an inclination of the second extended portion iscloser to perpendicular to the vehicle body panel than the inclinationof the first extended portion.

With this configuration, the leading end of the second lip portion, thatis, the leading end of the second extended portion can be brought intocontact with the vehicle body panel at an angle closer to perpendicularto the vehicle body panel. In this manner, the second lip portion can befavorably brought into close contact with the vehicle body panel.

[5] A configuration is also possible in which a leading end position ofthe first lip portion is spaced further apart from the opposing portionthan is a leading end position of the second lip portion.

With this configuration, when inserting the grommet into the mountinghole, in the water-blocking portion, the first lip portion comes incontact with the vehicle body panel first, and then the second lipportion comes in contact with the vehicle body panel. In this manner, itis possible to compressively deform the first lip portion and the secondlip portion more favorably in the state in which the grommet is mountedto the vehicle body panel.

[6] A configuration is also possible in which, in a state in which thegrommet is mounted to the vehicle body panel, each of the first lipportion and the second lip portion is spaced apart from the opposingportion.

With this configuration, it is possible to prevent the first lip portionand the second lip portion that suction to the vehicle body panel frombeing squashed by the opposing portion. As a result, it is possible tofavorably maintain a state in which the first lip portion and the secondlip portion suction to the vehicle body panel.

Details of Embodiments of the Present Disclosure

Specific examples of the grommet of the present disclosure will bedescribed hereinafter with reference to the drawings. In the drawings,for illustrative reasons, portions of the configuration may beemphasized or simplified in some cases. Also, dimensional proportions ofthe portions are different in the drawings in some cases. “Parallel”,“orthogonal”, and “perpendicular” in the present specification includenot only being exactly parallel, orthogonal, and perpendicular but alsoapproximately parallel, orthogonal, and perpendicular within a range inwhich the operation and effects of the present embodiment can beachieved.

Note that “tubular” used in the description of the present specificationincludes not only a shape in which a circumferential wall iscontinuously formed on the entire circumference, but also a tubularshape formed by combining multiple parts and a shape partially includinga cutout in the circumferential direction such as a C shape. Also, a“tubular” shape includes a circle, an oval, or a polygon including sharpor rounded corners. Also, “annular” used in the description of thepresent specification may mean any structure that forms a loop, acontinuous shape without ends, or a general loop-shaped structure havinga gap such as a C shape, for example. Note that an “annular” shapeincludes a circle, an oval, and a polygon having sharp or roundedcorners, but there is no limitation to this.

A grommet 10 of the present embodiment shown in FIG. 1 is mounted into amounting hole 12 formed in a vehicle body panel 11 of an automobile. Awire harness W is inserted into the mounting hole 12. The wire harness Wis configured to include at least a single wire. The grommet 10 ensuresthe water blocking property of a region between the mounting hole 12 andthe wire harness W. The grommet 10 also acts to prevent the wire harnessW from interfering with the circumferential edge of the mounting hole12.

A vehicle body panel 11 is a panel that partitions the vehicle interiorand the vehicle exterior of the automobile, for example. The vehicleexterior includes, for example, an engine compartment. Out of the twosurfaces of the vehicle body panel 11, the surface facing the vehicleinterior is a first surface 13 and the other surface facing the vehicleexterior is a second surface 14. The vehicle body panel 11 includes abent portion 15 formed by a circumferential edge of the mounting hole 12being bent toward the second surface 14. The bent portion 15 is formedthrough burring, for example. The bent portion 15 is formed around theentire circumference of the mounting hole 12. The grommet 10 is mountedinto the mounting hole 12 from the first surface 13 side, for example.

Overall Configuration of Grommet 10

As shown in FIG. 2, the grommet 10 is provided with an inner member 20and a grommet main body 30.

The grommet main body 30 is formed by a highly flexible material. Inother words, the grommet main body 30 is likely to deform as a whole. Asa constituent material of the grommet main body 30, for example, anelastomer such as EPDM (specifically, ethylene propylene diene rubber)can be used. The inner member 20 is formed by a material that is morerigid than the grommet main body 30. That is, the inner member 20 isunlikely to deform as a whole. As the constituent material of the innermember 20, for example, a synthetic resin material such as PP(specifically, polypropylene) can be used.

Configuration of Inner Member 20

The inner member 20 includes a tube portion 21 that is inserted into themounting hole 12. The tube portion 21 is formed in an annular shape thatconforms to the circumferential edge of the mounting hole 12. Also, thetube portion 21 is formed in an annular shape that is slightly smallerthan the circumferential edge of the mounting hole 12. The wire harnessW is inserted into the tube portion 21. Note that, in the followingdescription, a direction orthogonal to a central axis line L of themounting hole 12 is referred to as a first direction D.

The tube portion 21 has locking pieces 22. A plurality of locking pieces22 are provided, for example. The locking pieces 22 are configured towarp along the first direction D. The grommet 10 is fixed to the vehiclebody panel 11 by the locking pieces 22 catching on the circumferentialedge of the mounting hole 12. In an outer circumferential surface 21 aof the tube portion 21, for example, a groove portion 23 that extendsalong the central axis line L of the mounting hole 12 is formed. Thegroove portion 23 is formed at the position opposing the locking pieces22 in the first direction D.

The inner member 20 includes a flange portion 24 that extends from thetube portion 21 toward the outer circumference. The flange portion 24is, for example, provided at one end in the axial direction of the tubeportion 21. The outer shape of the flange portion 24 as seen in thecentral axis line L direction is larger than the mounting hole 12. Inthe state in which the grommet 10 is mounted to the vehicle body panel11, the flange portion 24 is located on the first surface 13 side of thevehicle body panel 11. Note that, in the following description, “thestate in which the grommet 10 is mounted to the vehicle body panel 11”may be simply referred to as “the mounted state”.

Configuration of Grommet Main Body 30

The grommet main body 30 includes a covering portion 31, an opposingportion 32, a first water-blocking portion 33, a second water-blockingportion 34, and a supporting portion 35.

The covering portion 31 covers one side surface in the central axis lineL direction of the flange portion 24 and one end portion of the tubeportion 21. As shown in FIG. 1, the covering portion 31 includes atubular insertion portion 36. The wire harness W is inserted into theinsertion portion 36 in a state in which the water blocking property isensured.

As shown in FIGS. 2 and 3, the opposing portion 32 is formedcontinuously with the outer edge of the covering portion 31. Theopposing portion 32 is formed in an annular shape that conforms to thecircumferential edge of the mounting hole 12, for example. The flangeportion 24 is positioned between the opposing portion 32 and thecovering portion 31. In this manner, the grommet main body 30 is held bythe flange portion 24. In the mounted state, the opposing portion 32opposes a portion surrounding the mounting hole 12 of the vehicle bodypanel 11 in a direction along the central axis line L.

An opposing surface of the opposing portion 32 that faces the vehiclebody panel 11 is formed in a planar shape that is orthogonal to thecentral axis line L, for example. The first water-blocking portion 33,the second water-blocking portion 34, and the supporting portion 35extend from the opposing surface. In the opposing surface, for example,a surface on the inner circumferential side with respect to the secondwater-blocking portion 34 and a surface on the outer circumferentialside with respect to the second water-blocking portion 34 are located ona same plane.

As shown in FIG. 4, the first water-blocking portion 33, the secondwater-blocking portion 34, and the supporting portion 35 each extendfrom the opposing portion 32 and come in contact with the vehicle bodypanel 11. The first water-blocking portion 33, the second water-blockingportion 34, and the supporting portion 35 are each formed in an annularshape surrounding the mounting hole 12. The second water-blockingportion 34 is provided on the outer circumferential side with respect tothe first water-blocking portion 33. The supporting portion 35 isprovided on the outer circumferential side with respect to the secondwater-blocking portion 34. The opposing portion 32, the firstwater-blocking portion 33, the second water-blocking portion 34, and thesupporting portion 35 are sandwiched and compressed between the flangeportion 24 and the vehicle body panel 11. Note that, in the mountedstate, the opposing portion 32, the first water-blocking portion 33, thesecond water-blocking portion 34, and the supporting portion 35 arelocated on the first surface 13 side, which is the vehicle interiorside, of the vehicle body panel 11, for example. In this case, the firstwater-blocking portion 33, the second water-blocking portion 34, and thesupporting portion 35 are in contact with the first surface 13 of thevehicle body panel 11.

Configuration of First Water-Blocking Portion 33

The first water-blocking portion 33 extends from the inner edge of theopposing portion 32, for example. The first water-blocking portion 33extends approximately along the central axis line L of the mounting hole12, for example. In an unmounted state, the first water-blocking portion33 opposes the locking piece 22 in a direction along the central axisline L, for example. The first water-blocking portion 33 includes aninclined surface 37 on a side face on the outer circumferential side,for example. The inclined surface 37 inclines toward the innercircumference from the opposing portion 32 side toward the vehicle bodypanel 11. The inner side surface of the first water-blocking portion 33and the inner side surface of the opposing portion 32 oppose the outercircumferential surface 21 a of the tube portion 21 in the firstdirection D.

In the mounted state, the first water-blocking portion 33 is interposedbetween the circumferential edge of the mounting hole 12 and the tubeportion 21 in the first direction D. In the present embodiment, the bentportion 15 that is bent to the opposite side to the opposing portion 32is formed at the circumferential edge of the mounting hole 12. In thismanner, the first water-blocking portion 33 is interposed between thebent portion 15 and the tube portion 21 in the first direction D. Thebent portion 15 is formed by bending a plate material constituting thevehicle body panel 11. In this manner, the bent portion 15 includes acurved surface. The first water-blocking portion 33 is in contact withthe curved surface of the bent portion 15.

Configuration of Second Water-blocking Portion 34

As shown in FIGS. 2 and 3, the second water-blocking portion 34 includesa base portion 40, a first lip portion 41, and a second lip portion 42.

The base portion 40 is formed in an annular shape that conforms to thecircumferential edge of the mounting hole 12. The base portion 40extends toward the vehicle body panel 11 while inclining toward theouter circumference. Accordingly, as shown in FIG. 4, the base portion40 is likely to fall toward the outer circumference due to the leadingend of the second water-blocking portion 34 coming in contact with thevehicle body panel 11. For this reason, the insertion force at the timeof mounting the grommet 10 into the mounting hole 12 is reduced. Also,due to the base portion 40 having the inclined shape, the deformation ofthe base portion 40 in the mounted state is limited to deformationtoward the outer circumference. In this manner, the deformation of thesecond water-blocking portion 34 in the mounted state is stabilized.

As shown in FIG. 2 and FIG. 3, the first lip portion 41 and the secondlip portion 42 each extend from the leading end of the base portion 40.The first lip portion 41 and the second lip portion 42 are formed in anannular shape that conforms to the circumferential edge of the mountinghole 12. The second lip portion 42 is provided on the innercircumferential side of the first lip portion 41. The first lip portion41 and the second lip portion 42 oppose each other in the firstdirection D. The first lip portion 41 extends from the opposing portion32 side toward the vehicle body panel 11 while inclining toward theouter circumference. The second lip portion 42 extends from the opposingportion 32 side toward the vehicle body panel 11 while inclining towardthe inner circumference, which is toward the first water-blockingportion 33.

The base portion 40 and the first lip portion 41 extend in the samedirection, for example. In other words, the base portion 40 and thefirst lip portion 41 are formed such that a cross-sectional shape thatis parallel to and passes through the central axis line L extends in astraight line. The second lip portion 42 extends so as to branch from anintermediate portion of a portion formed by the base portion 40 and thefirst lip portion 41 that extends in a straight line. In the unmountedstate, the leading end position of the first lip portion 41 is spacedfurther apart from the opposing portion 32 than is the leading endposition of the second lip portion 42. In the mounted state, the leadingend of the first lip portion 41 is in contact with the first surface 13of the vehicle body panel 11.

The second lip portion 42 includes a first extended portion 51 thatextends from the base portion 40 and a second extended portion 52 thatextends from the leading end of the first extended portion 51. Theinclination angle of the first extended portion 51 and the inclinationangle of the second extended portion 52 are different from each other.Specifically, the second lip portion 42 includes a bent portion 53between the first extended portion 51 and the second extended portion52. The inclination of the second extended portion 52 is closer toperpendicular to the vehicle body panel 11 than the inclination of thefirst extended portion 51. In the mounted state, the second extendedportion 52 is in contact with the first surface 13 of the vehicle bodypanel 11.

Configuration of Supporting Portion 35

As shown in FIG. 2 and FIG. 3, the supporting portion 35 is formed in anannular shape that conforms to the circumferential edge of the mountinghole 12. The supporting portion 35 extends from the outer edge of theopposing portion 32 toward the vehicle body panel 11. In the unmountedstate, the leading end portion of the supporting portion 35 extendstoward the vehicle body panel 11 while being displaced toward the innercircumference, which is toward the second water-blocking portion 34, forexample.

As shown in FIG. 4, the entire circumference of the supporting portion35 is in close contact with the vehicle body panel 11. Since the leadingend of the supporting portion 35 is displaced toward the innercircumference in the unmounted state as described above, in the mountedstate, the leading end portion of the supporting portion 35 bends towardthe inner circumference due to contact with the vehicle body panel 11.The supporting portion 35 acts to stabilize the orientation of thegrommet 10 in the mounted state.

The operation of the present embodiment will be described below.

In the vehicle body panel 11, the second surface 14 side, which is onthe vehicle exterior side, is likely to get wet. Water on the secondsurface 14 side is likely to enter toward the first surface 13 through agap between the circumferential edge of the mounting hole 12 and thetube portion 21 of the inner member 20. Here, the entire circumferenceof the first water-blocking portion 33 is sandwiched and compressedbetween the circumferential edge of the mounting hole 12 and the outercircumferential surface 21 a of the tube portion 21. In this manner,water on the second surface 14 side is suppressed from entering throughthe gap between the mounting hole 12 and the tube portion 21.

The water that could not be prevented from entering by the firstwater-blocking portion 33 enters between the first water-blockingportion 33 and the second water-blocking portion 34. The water isblocked so as not to enter the outer circumferential side of the secondwater-blocking portion 34 by the second water-blocking portion 34. Here,in the mounted state, the second water-blocking portion 34 suctions tothe first surface 13 of the vehicle body panel 11 due to the shapes ofthe first lip portion 41 and the second lip portion 42. In other words,a space surrounded by the first lip portion 41, the second lip portion42, and the vehicle body panel 11 is converted to negative pressure, andas a result, the first lip portion 41 and the second lip portion 42suction to the vehicle body panel 11 due to the action of external airpressure. In the state in which the second water-blocking portion 34suctions to the vehicle body panel 11, the first lip portion 41 and thesecond lip portion 42 come in contact with the vehicle body panel 11without distortion. For this reason, in this state, it is very unlikelythat a gap will be generated between the first and second lip portions41 and 42 and the vehicle body panel 11.

Note that, in the mounted state, the first lip portion 41 and the secondlip portion 42 are spaced apart from the opposing portion 32. In thismanner, the first lip portion 41 and the second lip portion 42 thatsuction to the vehicle body panel 11 are not squashed by the opposingportion 32. For this reason, the state in which the first lip portion 41and the second lip portion 42 suction to the vehicle body panel 11 isfavorably maintained.

Most of the water that attempts to enter from the second surface 14 sideof the vehicle body panel 11 toward the first surface 13 is blocked bythe first water-blocking portion 33 and the second water-blockingportion 34. However, in some cases, even the second water-blockingportion 34 cannot block water and a small amount of water enters theouter circumferential side of the second water-blocking portion 34. Atthis time, the water that has entered the outer circumferential side ofthe second water-blocking portion 34 is blocked by the supportingportion 35 that is in close contact with the first surface 13. In otherwords, the supporting portion 35 is configured as a third water-blockingportion of the grommet 10.

As described above, the grommet 10 of the present embodiment has awater-blocking structure that blocks water that attempts to enter fromthe second surface 14 side of the vehicle body panel 11 toward the firstsurface 13 at three stages; namely, the first water-blocking portion 33,the second water-blocking portion 34, and the supporting portion 35.

The effects of the present embodiment will be described below.

(1) The second water-blocking portion 34 has a configuration in whichthe lip portion at the leading end of the base portion 40 is branchedinto two. Accordingly, it is possible to favorably gain sufficientcontact area between the second water-blocking portion 34 and thevehicle body panel 11. As a result, the water blocking property of thesecond water-blocking portion 34 can be improved.

Furthermore, in the second water-blocking portion 34, the first lipportion 41 extends toward the vehicle body panel 11 while incliningtoward the outer circumference, and the second lip portion 42 extendstoward the vehicle body panel 11 while inclining toward the innercircumference. In this manner, when the first lip portion 41 and thesecond lip portion 42 are brought into close contact with the vehiclepanel 11, it is possible to cause the second water-blocking portion 34suction to the vehicle body panel 11 due to the space surrounded by thefirst lip portion 41, the second lip portion 42, and the vehicle bodypanel 11 being converted to negative pressure. When the secondwater-blocking portion 34 suctions to the vehicle body panel 11, a gapis unlikely to be generated between the vehicle body panel 11 and thesecond water-blocking portion 34, and as a result, the water-blockingproperty of the second water-blocking portion 34 can be improved.

Furthermore, according to the above configuration, it is possible toreduce the insertion force at the time of inserting the grommet 10 intothe mounting hole 12 due to deformation of the base portion 40 while thefirst lip portion 41 and the second lip portion 42 are brought intoclose contact with the vehicle body panel 11.

(2) The base portion 40 extends toward the vehicle body panel 11 whileinclining toward the outer circumference. With this configuration, whenthe second blocking portion 34 is pressed against the vehicle body panel11, the base portion 40 of the second water-blocking portion 34 can befavorably bent toward the inner or outer circumference. In this manner,it is possible to reduce the insertion force at the time of insertingthe grommet 10 into the mounting hole 12 more favorably. As a result, itis possible to more favorably contribute to improvement of themountability of the grommet 10.

(3) The base portion 40 and the first lip portion 41 extend in the samedirection. With this configuration, it is possible to bring the firstlip portion 41 into close contact with the vehicle body panel 11.

(4) The second lip portion 42 includes the first extended portion 51that extends from the base portion 40 and the second extended portion 52that extends from the leading end of the first extended portion 51. Theinclination of the second extended portion 52 is closer to perpendicularto the vehicle body panel 11 than the inclination of the first extendedportion 51. With this configuration, the leading end of the second lipportion 42, that is, the leading end of the second extended portion 52can be brought into contact with the vehicle body panel 11 at an anglecloser to perpendicular (to the vehicle body panel 11). In this manner,it is possible to favorably bring the second lip portion 42 into closecontact with the vehicle body panel 11.

(5) The leading end position of the first lip portion 41 is spacedfurther apart from the opposing portion 32 than is the leading endposition of the second lip portion 42. With this configuration, wheninserting the grommet 10 into the mounting hole 12, in the secondwater-blocking portion 34, the first lip portion 41 comes in contactwith the vehicle body panel 11 first, and then the second lip portion 42comes in contact with the vehicle body panel 11. In this manner, in thestate of being mounted to the vehicle body panel 11, the first lipportion 41 and the second lip portion 42 can be compressively deformedmore favorably.

(6) In the state of being mounted to the vehicle body panel 11, each ofthe first lip portion 41 and the second lip portion 42 is configured tobe spaced apart from the opposing portion 32. With this configuration,it is possible to prevent the first lip portion 41 and the second lipportion 42 that suction to the vehicle body panel 11 from being squashedby the opposing portion 32. As a result, it is possible to favorablymaintain the state in which the first lip portion 41 and the second lipportion 42 suction to the vehicle body panel 11.

(7) The first water-blocking portion 33 and the second water-blockingportion 34 each have an annular shape surrounding the mounting hole 12.The second water-blocking portion 34 is provided on the outercircumferential side of the first water-blocking portion 33. With thisconfiguration, for example, when water attempts to enter from the secondsurface 14 side of the vehicle body panel 11 toward the first surface 13through the mounting hole 12, the entry of water can be suppressed atmultiple stages by the first water-blocking portion 33 and the secondwater-blocking portion 34. In this manner, the water blocking propertyof the grommet 10 can be improved.

(8) The first water-blocking portion 33 is sandwiched between thecircumferential edge of the mounting hole 12 and the tube portion 21 ofthe inner member 20 in the first direction D that is orthogonal to thecentral axis line L of the mounting hole 12. Accordingly, it is possibleto favorably water-block the gap between the circumferential edge of themounting hole 12 and the tube portion 21 by the first water-blockingportion 33.

Also, since the inner member 20 is a comparatively highly rigid member,a gap is provided between the tube portion 21 and the mounting hole 12in order to prevent interference between the tube portion 21 of theinner member 20 and the mounting hole 12 due to dimension variation.Also, the flexible first water-blocking portion 33 is interposed in thegap between the tube portion 21 and the mounting hole 12. In thismanner, looseness of the inner member 20 is suppressed by the firstwater-blocking portion 33.

Also, the first water-blocking portion 33 is positioned in the gapbetween the tube portion 21 and the mounting hole 12 around the entirecircumference. Accordingly, the first water-blocking portion 33 acts toguide the tube portion 21 such that the central axis line of the tubeportion 21 coincides with the central axis line L of the mounting hole12. In this manner, since the inner member 20 is appropriatelypositioned by the first water-blocking portion 33, it is possible toprovide the grommet 10 that exhibits a stable water blocking property.

(9) The vehicle body panel 11 includes the bent portion 15 in which thecircumferential edge of the mounting hole 12 is bent to the oppositeside to the opposing portion 32. Also, the first water-blocking portion33 is sandwiched between the bent portion 15 of the mounting hole 12 andthe tube portion 21 in the first direction D. In this manner, aconfiguration can be achieved in which the first water-blocking portion33 is not in contact with the circumferential edge of the mounting hole12. Accordingly, damage to the first water-blocking portion 33 can besuppressed, and as a result, deterioration of the water blockingproperty of the first water-blocking portion 33 can be suppressed.

(10) The vehicle body panel 11 is a panel that partitions the vehicleinterior and the vehicle exterior of the vehicle. Also, the opposingportion 32, the first water-blocking portion 33, and the secondwater-blocking portion 34 are located on the vehicle interior side ofthe vehicle body panel 11. Water is likely to enter the vehicle exteriorside of the vehicle body panel 11. When the water on the vehicleexterior side attempts to enter the vehicle interior through the gapbetween the circumferential edge of the mounting hole 12 and the tubeportion 21 of the inner member 20, entry of the water can be suppressedfirst by the first water-blocking portion 33, and then by the secondwater-blocking portion 34.

(11) The grommet 10 is provided with the supporting portion 35 thatextends from the opposing portion 32 and comes in contact with thevehicle body panel 11. The supporting portion 35 is formed in an annularshape surrounding the mounting hole 12. Also, the supporting portion 35is provided on the outer circumferential side of the secondwater-blocking portion 34. According to this configuration, theorientation of the grommet 10 in the state of being mounted to thevehicle body panel 11 is stabilized by the supporting portion 35 that isin contact with the vehicle body panel 11. In this manner, it ispossible to suppress the situation in which the grommet 10 inclines withrespect to the mounting hole 12 due to a force received from the wireharness W or the like, for example. As a result, it is possible tosuppress a case in which the contact pressure of the firstwater-blocking portion 33 and the second water-blocking portion 34against the vehicle body panel 11 partially decreases.

(12) The supporting portion 35 extends from the outer edge of theopposing portion 32. With this configuration, it is possible to suppressthe inclination of the grommet 10 more favorably by the supportingportion 35 that extends from the outer edge of the opposing portion 32.

(13) The entire circumference of the supporting portion 35 is in closecontact with the vehicle body panel 11. With this configuration, waterthat runs along the vehicle body panel 11 can be blocked by thesupporting portion 35.

The present embodiment can be implemented by making modifications asfollows. The present embodiment and the modifications below may beimplemented in combination with each other as long as no technicalcontradictions arise.

-   -   In the first direction D, a configuration is also possible in        which the first water-blocking portion 33 is not sandwiched        between the circumferential edge of the mounting hole 12 and the        tube portion 21, and the first water-blocking portion 33 is        merely in contact with the first surface 13 of the vehicle body        panel 11, for example.    -   The shape of the base portion 40 is not limited to the        above-described embodiment, and may be changed as appropriate.        For example, a configuration is also possible in which the base        portion 40 extends toward the vehicle body panel 11 while        inclining toward the inner circumference. According to this        configuration, when the second water-blocking portion 34 is        pressed against the vehicle body panel 11, the base portion 40        of the second water-blocking portion 34 can be favorably bent        toward the inner circumference. Also, for example, a        configuration is possible in which the base portion 40 extends        perpendicular to the vehicle body panel 11.    -   The shape of the first lip portion 41 is not limited to the        above-described embodiment, and may be changed as appropriate.        For example, the inclination angle of the first lip portion 41        may be different from the inclination angle of the base portion        40. A configuration is also possible in which the first lip        portion 41 bends at an intermediate portion thereof.    -   The shape of the second lip portion 42 is not limited to the        above-described embodiment, and may be changed as appropriate.        For example, a configuration is also possible in which, the        second lip portion 42 is provided with no bent portion 53 and        extends in a straight line.    -   In the second water-blocking portion 34 of the above-described        embodiment, the leading end position of the second lip portion        42 may be set to a position that is spaced further apart from        the opposing portion 32 than is the leading end position of the        first lip portion 41. According to this configuration, when the        grommet 10 is inserted into the mounting hole 12, it is possible        to bring in the second water-blocking portion 34, the second lip        portion 42 comes in contact with the vehicle body panel 11        first, and then the first lip portion 41 in contact with the        vehicle body panel 11.    -   In the above-described embodiment, in the mounted state, each of        the first lip portion 41 and the second lip portion 42 is spaced        apart from the opposing portion 32, but there is no limitation        to this, and a configuration is also possible in which, in the        mounted state, the first lip portion 41 and the second lip        portion 42 are in contact with the opposing portion 32.    -   The position of the base of the supporting portion 35 may be        changed from the outer edge of the opposing portion 32 to a        location closer to the inner circumference.    -   In the above-described embodiment, the entire circumference of        the supporting portion 35 is in close contact with the vehicle        body panel 11, but there is no limitation to this. A        configuration is also possible in which part of the supporting        portion 35 in the circumferential direction comes in contact        with the vehicle body panel 11, for example. Also, a        configuration is possible in which a plurality of supporting        portions 35 are dispersedly located in the circumferential        direction of the opposing portion 32, for example. That is, the        supporting portion 35 need not necessarily have the water        blocking property, unlike these modifications.    -   In the above-described embodiment, the first water-blocking        portion 33 and the supporting portion 35 may also be omitted.    -   The materials that form the grommet main body 30 and the inner        member 20 are not limited to the above-described embodiment, and        may be changed as appropriate in accordance with the        configuration.    -   The above-described embodiment is applied to the grommet 10 that        is to be mounted from the vehicle interior side with respect to        the mounting hole 12, but the embodiment may also be applied to        a grommet that is to be mounted from the vehicle exterior side.    -   The above-described embodiment is applied to the grommet 10 that        is to be attached into the mounting hole 12 in which the bent        portion 15 is formed, but there is no limitation to this, and        the embodiment may also be applied to a grommet that is to be        attached into the mounting hole 12 with no bent portion 15.    -   The above-described embodiment is applied to the grommet 10 that        is formed by the grommet main body 30 that is formed by a highly        flexible material such as elastomer and the inner member 20 that        is more rigid than the grommet main body 30. However, there is        no limitation to this in particular, and the embodiment may also        be applied to a grommet formed only by a highly flexible        material.    -   The embodiments and modifications disclosed herein should be        considered exemplary in all respects and not restrictive. The        scope of the present invention is indicated not by the        above-described meaning, but by the scope of claims, and all        changes that come within the meaning and range of equivalency of        the claims are intended to be embraced therein.

From the foregoing, it will be appreciated that various exemplaryembodiments of the present disclosure have been described herein forpurposes of illustration, and that various modifications may be madewithout departing from the scope and spirit of the present disclosure.Accordingly, the various exemplary embodiments disclosed herein are notintended to be limiting, with the true scope and spirit being indicatedby the following claims.

What is claimed is:
 1. A grommet that is to be mounted into a mountinghole of a vehicle body panel through which a wire harness is to bepassed, the grommet comprising: an opposing portion that is to oppose aportion surrounding the mounting hole in the vehicle body panel; and awater-blocking portion that extends from the opposing portion and is tocome in contact with the vehicle body panel, wherein the water-blockingportion is formed in an annular shape that is to surround the mountinghole, the water-blocking portion includes: a base portion that extendsfrom the opposing portion toward the vehicle body panel; a first lipportion that extends from the leading end of the base portion and is tocome in contact with the vehicle body panel; and a second lip portionthat extends from the leading end of the base portion and is to come incontact with the vehicle body panel, the first lip portion is to extendtoward the vehicle body panel while inclining toward an outercircumference, and the second lip portion is to extend toward thevehicle body panel while inclining toward an inner circumference.
 2. Thegrommet according to claim 1, wherein the base portion is to extendtoward the vehicle body panel while inclining toward the outercircumference or the inner circumference.
 3. The grommet according toclaim 2, wherein the base portion is to extend toward the vehicle bodypanel while inclining toward the outer circumference, and the baseportion and the first lip portion extend in the same direction.
 4. Thegrommet according to claim 3, wherein the second lip portion includes afirst extended portion that extends from the base portion and a secondextended portion that extends from the leading end of the first extendedportion, and an inclination of the second extended portion is closer toperpendicular to the vehicle body panel than the inclination of thefirst extended portion.
 5. The grommet according to claim 3, wherein aleading end position of the first lip portion is spaced further apartfrom the opposing portion than is a leading end position of the secondlip portion.
 6. The grommet according to claim 1, wherein, in a state inwhich the grommet is mounted to the vehicle body panel, each of thefirst lip portion and the second lip portion is spaced apart from theopposing portion.